package com.sholmes.android.scribbler;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

public class BluetoothService{
	
	private static final String TAG = "BluetoothService";
	
    // Constants that indicate the current connection state
    public static final int STATE_DISCONNECTED = 0;       // we're doing nothing    
    public static final int STATE_CONNECTING = 2; // now initiating an outgoing connection
    public static final int STATE_CONNECTED = 3;  // now connected to a remote device

    private final Handler _handler;
    
    //Unique UUID for this application
    private static final UUID SCRIBBLER = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
    
    // Member fields
    private final BluetoothAdapter _mAdapter;
    

    
    private ConnectThread mConnectThread;
    private ConnectedThread mConnectedThread;
    
    private int _mState;
    
    public BluetoothService(Context context, Handler handler){
    	this._handler = handler;
    	this._mAdapter = BluetoothAdapter.getDefaultAdapter();
    	this._mState = STATE_DISCONNECTED;        
   }
    
    
    
    private synchronized void setState(int state) {
    	_mState = state;
    	
    	// Give the new state to the Handler so the UI Activity can update
        _handler.obtainMessage(ScribblerActivity.MESSAGE_STATE_CHANGE, state, -1).sendToTarget();
    }
    
    public synchronized int getState() {
        return _mState;
    }
    
    
    public synchronized void disconnect(){
    	this.stop();
    }
    
    /**
     * Start and initialize the connection to the robot.
     * 
     */    
    private synchronized void start() {
    	Log.d(TAG, "start");

        // Cancel any thread attempting to make a connection
        if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;}

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;}
        
        setState(STATE_DISCONNECTED);
    }
    
    
    
    
    /**
     * Start the ConnectThread to initiate a connection to a remote device.
     * @param device  The BluetoothDevice to connect
     */
    public synchronized void connect(BluetoothDevice device) {
    	Log.d(TAG, "connect to: " + device);

        // Cancel any thread attempting to make a connection
        if (_mState == STATE_CONNECTING) {
            if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;}
        }

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;}

        // Start the thread to connect with the given device
        mConnectThread = new ConnectThread(device);
        mConnectThread.start();
        
        
        /*
         * The order of the next two events matter.
         * 1) set state of the connection
         * 2) send the device name to be appended
         */
        setState(STATE_CONNECTING);
        
        Message msg = _handler.obtainMessage(ScribblerActivity.MESSAGE_DEVICE_NAME);
        Bundle bundle = new Bundle();
        bundle.putString(ScribblerActivity.DEVICE_NAME, device.getName());
        msg.setData(bundle);
        _handler.sendMessage(msg);
        
    }
    
    
    /**
     * Start the ConnectedThread to begin managing a Bluetooth connection
     * @param socket  The BluetoothSocket on which the connection was made
     * @param device  The BluetoothDevice that has been connected
     */
    public synchronized void connected(BluetoothSocket socket, BluetoothDevice device) {
        Log.d(TAG, "connected");

        // Cancel the thread that completed the connection
        if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;}

        // Cancel any thread currently running a connection
        if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;}


        // Start the thread to manage the connection and perform transmissions
        mConnectedThread = new ConnectedThread(socket);
        mConnectedThread.start();

        
        /*
         * The order of the next two events matter.
         * 1) set state of the connection
         * 2) send the device name to be appended
         */
        	
        setState(STATE_CONNECTED);
       
        // Send the name of the connected device back to the UI Activity
        Message msg = _handler.obtainMessage(ScribblerActivity.MESSAGE_DEVICE_NAME);
        Bundle bundle = new Bundle();
        bundle.putString(ScribblerActivity.DEVICE_NAME, device.getName());
        msg.setData(bundle);
        _handler.sendMessage(msg);

        
    }


    /**
     * Stop all threads
     */
    public synchronized void stop() {
       Log.d(TAG, "stop");
        if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;}
        if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;}

        setState(STATE_DISCONNECTED);
    }

    /**
     * Write to the ConnectedThread in an unsynchronized manner
     * @param out The bytes to write
     * @see ConnectedThread#write(byte[])
     */
    public void write(byte[] out) {
        // Create temporary object
        ConnectedThread r;
        // Synchronize a copy of the ConnectedThread
        synchronized (this) {
            if (_mState != STATE_CONNECTED) return;
            r = mConnectedThread;
        }
        // Perform the write unsynchronized
        r.write(out);
    
    }

    /**
     * Indicate that the connection attempt failed and notify the UI Activity.
     */
    private void connectionFailed() {
        setState(STATE_DISCONNECTED);

       
        // Send a failure message back to the Activity
        Message msg = _handler.obtainMessage(ScribblerActivity.MESSAGE_TOAST);
        Bundle bundle = new Bundle();
        bundle.putString(ScribblerActivity.TOAST, "Unable to connect device");
        msg.setData(bundle);
        _handler.sendMessage(msg);
    }

    /**
     * Indicate that the connection was lost and notify the UI Activity.
     */
    
    @SuppressWarnings("unused")
	private void connectionLost() {
        setState(STATE_DISCONNECTED);


        // Send a failure message back to the Activity
        Message msg = _handler.obtainMessage(ScribblerActivity.MESSAGE_TOAST);
        Bundle bundle = new Bundle();
        bundle.putString(ScribblerActivity.TOAST, "Device connection was lost");
        msg.setData(bundle);
        _handler.sendMessage(msg);
    }


    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    


    /**
     * This thread runs while attempting to make an outgoing connection
     * with a device. It runs straight through; the connection either
     * succeeds or fails.
     */
    private class ConnectThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final BluetoothDevice mmDevice;

        public ConnectThread(BluetoothDevice device) {
            mmDevice = device;
            BluetoothSocket tmp = null;

            // Get a BluetoothSocket for a connection with the
            // given BluetoothDevice
            try {
            	
                tmp = device.createRfcommSocketToServiceRecord(SCRIBBLER);                
            } catch (IOException e) {
                Log.e(TAG, "create() failed", e);
            }
            mmSocket = tmp;
        }

        public void run() {
            Log.i(TAG, "BEGIN mConnectThread");
            setName("ConnectThread");

            // Always cancel discovery because it will slow down a connection
            _mAdapter.cancelDiscovery();

            // Make a connection to the BluetoothSocket
            try {
                // This is a blocking call and will only return on a
                // successful connection or an exception
                mmSocket.connect();
            } catch (IOException e) {
                connectionFailed();
                // Close the socket
                try {
                    mmSocket.close();
                } catch (IOException e2) {
                    Log.e(TAG, "unable to close() socket during connection failure", e2);
                }
                // Start the service over to restart listening mode
                BluetoothService.this.start();
                return;
            }

            // Reset the ConnectThread because we're done
            synchronized (BluetoothService.this) {
                mConnectThread = null;
            }

            // Start the connected thread
            connected(mmSocket, mmDevice);
        }

        public void cancel() {
            try {
                mmSocket.close();
            } catch (IOException e) {
                Log.e(TAG, "close() of connect socket failed", e);
            }
        }
    }

    /**
     * This thread runs during a connection with a remote device.
     * It handles all incoming and outgoing transmissions.
     */
    private class ConnectedThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final InputStream mmInStream;
        private final OutputStream mmOutStream;

        public ConnectedThread(BluetoothSocket socket) {
            Log.d(TAG, "create ConnectedThread");
            mmSocket = socket;
            InputStream tmpIn = null;
            OutputStream tmpOut = null;
            int size = 0;
            
            // Get the BluetoothSocket input and output streams
            try {
                tmpIn = socket.getInputStream();
                tmpOut = socket.getOutputStream();
                
                
            } catch (IOException e) {
                Log.e(TAG, "temp sockets not created", e);
            }

            mmInStream = tmpIn;
            mmOutStream = tmpOut;
            
        	try {
        		
        		
				mmOutStream.write(134);						
				size = mmInStream.available();
				for(int i=0; i<size;i++) System.out.print(mmInStream.read());        	
        	
				mmOutStream.write(143);			
				size = mmInStream.available();
				for(int i=0; i<size;i++) System.out.print(mmInStream.read());
				

				
        	
        	} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
        }

        public void run() {
            Log.i(TAG, "BEGIN mConnectedThread");
            Integer size;
            while(mConnectedThread != null){
            	try {
					size=mmInStream.available();

	            	if((size)>0){
	            		Log.d(TAG, "Reading bytes from scribbler: "+size);
	            		for(int i=0; i<size; i++){
	            			mmInStream.read();
	            		}
	            	}
            	} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
            }
            Log.i(TAG,"Exiting mConnectedThread");
            // Keep listening to the InputStream while connected
//            while (true) {
//                try {
//                    // Read from the InputStream
//                    bytes = mmInStream.read(buffer);
//
//                    // Send the obtained bytes to the UI Activity
//                    mHandler.obtainMessage(RobotControlActivity.MESSAGE_READ, bytes, -1, buffer)
//                            .sendToTarget();
//                } catch (IOException e) {
//                    Log.e(TAG, "disconnected", e);
//                    connectionLost();
//                    break;
//                }
//            }
        }

        /**
         * Write to the connected OutStream.
         * @param buffer  The bytes to write
         */
        public void write(byte[] buffer) {
//        	int size=0;
//        	try {                            	
//            	mmOutStream.write(buffer);
//            	size = mmInStream.available();
//            	Log.d(TAG, "Bytes waiting: " + size);
//            	for(int i=0; i<size;i++) System.out.print(mmInStream.read());
//            	
//            } catch (IOException e) {
//                Log.e(TAG, "Exception during write", e);
//            }
        
//       	 StringBuffer output = new StringBuffer();
       	 try {
       		 mmOutStream.write(buffer);
       		 Log.d(TAG, "Packet written: "+ buffer.toString());
       		 Log.d(TAG, "Bytes in output buffer: "+mmInStream.available());
       		//for(int i=0; i<mmInStream.available();i++) System.out.print(mmInStream.read());

//       		 for(int i=0; i<9;i++){
//       			 output.append(mmInStream.read());
//       		 }
//       		 Log.d(TAG, "Initially read 9 bytes: " + output.toString());
//       		
//       		 output = new StringBuffer();
//       		 for(int i=0; i<11;i++){
//       			 output.append(mmInStream.read());
//       		 }
//       		 Log.d(TAG, "Initially read 11 bytes: " + output.toString());
       		         		 
       	 } catch (IOException e) {
       		 Log.e(TAG, "Exception during write", e);
       	 }
        }

        
        public void cancel() {
            int size=0;
        	try {
        		byte stop[] = {(byte)(108 & 0xff),0,0,0,0,0,0,0,0};
        		mmOutStream.write(stop);
        		size = mmInStream.available();
            	for(int i=0; i<size;i++) System.out.print(mmInStream.read());
            	
                mmOutStream.write(144);
            	size = mmInStream.available();
            	for(int i=0; i<size;i++) System.out.print(mmInStream.read());            	
            	
            	mmOutStream.write(143);
            	size = mmInStream.available();
            	for(int i=0; i<size;i++) System.out.print(mmInStream.read());
                
            	
            	mmSocket.close();
            	
            } catch (IOException e) {
                Log.e(TAG,"close() of connect socket failed", e);
            }
        }
    }

    
}
